Drilling-machine.



G. H. A. F. L. ROSS.

DRILLING MACHINE.

APPLIGATION FIL'ED JULY 3, 1913.

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DRILLING MACHINE.

APPLICATION FILED JULY 3', 1913. 1,125,111 Patented Jan.19,1915.

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0. H. A. P. L. ROSS.

' DRILLING MACHINE.

APPLICATION FILED JULY 3,1913.

Patented Ja11.19,1915.

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DRILLING MACHINE.

APPLICATION FILED JULY a, 1913.

Patented Jan. 19, 1915.

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DRILLING MACHINE. APPLICATION FILED JULY a, 1913.

Patented J an. 19, 1915.

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0. H. A. F.- L. ROSS.

DRILLING MACHINE. APPLIGATION FILED JULY 3, 1913.

Patented Jan. 19, 1915.

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DRILLING MACHINE.

APPLICATION FILED mm 3, 1211s..

1,125,181. Patented Jan. 19, 1915.

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G. H. A. P. L. ROSS.

DRILLING MACHINE.

APPLIOATION FILED JULY 3, 1913.

Patented Jan. 19, 1915.

8 SHEETSSHEET 8.

UHARLES HENRY AUGUSTUS FREDERICK LOCKHAB 'I ROSS, F BALNAGQVJN CASTLE,

. GQUNTY 0F ROSS, SCOTLAND.

DRILLING-MAGHINE.

Specification of Letters Patent.

Patented Jan. 12 1215.

To all whom it may concern Be it known that I, Ceramics HENRY Ancosrns FREDERICK LOGKHART Ross, a subject of the King of Great Britain, residing at Balnagown Castle,'c0unty of Ross, Scotland, have inventedvcerta-in new and useful Improvements in Drilling-Machines; and I do hereby declare the following to be a full, clear, and exact description of the invention,

such as will enable others skilled in the art to which it appertains .to make and use same.

This invention relates to drilling machines especially adapted for forming the bores in gun barrels, and has for its object to provide a machine of this character which will be simple in construction, certain in operation, and more efiicient in action those heretofore proposed.

With these and other objects 'in' view, the invention consists in the novel details of construction and combinations of parts more fully hereinafter disclosed and particularly pointed out in the claims.

Referring to the accompanying drawings forming a part of this'specificatiomin which like numerals designate like parts in all the views:-Fi-gure 1 is a side elevational view of a machine-made in accordance with in invention comprising four drill spindles; Fig. 2 is an end elevational view of the parts shown in Fig. 1; Fig. 3 is a sectional view taken on the line 33 of Fig. 1;. Fig. 4 is a the sectional view taken on'the line M of Fig.

1: Fig. 5 is a sectional view taken on the line 5-5 of Fig. 1; Fig. 6 is a sectional detail view of the means for readily clamping in position the rods attached to the chiphoods; Fig. 7 is an elevational view partly in perspective of the means for controlling the connection between a tail stock and its feed screw; Fig. 8 is an end elevational view partly in section of the parts shown in Fig. 7, and also illustrating the guide rods between which the tail stock rests; Fig. 9 is a lon itudinal sectional view of the parts, shown in Fig. 7 Fig. 10 is a cross sectional view of the arts shown in Fig. 9; Fig. 11 is a longitudinal view taken through a head stock, the corresponding transmitting mechanism, and its associated parts; Fig. 1251s a cross sectional view of the arts show'n'in Fig. 11, and also illustrating the guide rods between which the head stock is clamped;

- Fin. 13 is a cross sectional view illustratin than 19, carried by the res shafts 20 on which are mounted the curved certain portions of the tail stock and the automatic means associated therewith for cutting off the power when the friction between the drill and work becomes too great; Fig. 14 is a diagrammatic "plan view showing a portion of the mechanism illustrated in Fig. 13; and, Fig. 15 is a diagrammatic sectional view of one of the chiphoods' illustrating the work, the hollow drill, and its associated parts,

1 indicates any suitable framework pro-' vided with the end standards or members 2, between which extends the guide rods 3, 4, 5, 6 and 7 associated with each'of which are the feed-screws 8, 9, 10, and 11 respectively. The said feed screws are further respectively provided -with the beveled'gears 12, 13, 14 and 15, which in turn respectwely mesh with the beveled ears 16, 17, 18 and 11y adjustable stud slotted members 21 coacting with the bolt and nut mechanism 22 adapted to secure the said shafts in any angular position to which the'slots 23 may be adjusted, as will be readily understood. Also mounted on the stull shafts 20 are the gears 2-i'adapted to mesh with the worms 25 carried by the shafts 26 on which are mounted the gears 27 meshing with the pinions 28, mounted upon the driving shafts 29, each carrying fast and loose pulleys 30 and 31 respectively, all as will be clear from Figs. 1, 2 and 11. Coacting with the fast and loosepulleys 30 and 31 are the power belts 32 associated with the automatic bell shifters 33 to be mentioned below.

From what has now been disclosed, it will be clear that power may be transmitted from the pulley 31 through the ower shafts 29, the pinions 28, the gears 2 and the above described connecting mechanism to the feed screws 8, 9, 10, etc. It will also be clear that by adjusting the curved slotted members 21, the said stud shafts 20 may be readily so turned as to disengage or separate the gear 24 from its corresponding worm 25, and therefore, the particular feed screw associated with said gear 24, may be readily cut out.

Referring now more particularly to Figs. 1 and 3, it will be observed that the guide rods numbered from 3 to 7 are associated with a sectional member, 35 forming a sort of bed plate or strip, and that the various head stocks 36 are provided with integral extensions 37, which are bolted to said bed plate or strip 35, as by the means 38, so as to firmly secure said head stocks to the framework of the machine. The feed screws pass through this bed plate or strip, as illustrated, and the said head stocks, as well as the strip-like member 35, are supported from the guide rods 3, 4, 5, 6 and 7 Also supported upon the said guide rods are a plurality of tail stocks 40, as will be clear from Fig. 5. Further, between the tail stocks and the head stocks are located a pluralityof chiphoods l2 (see Figs. 1 and 15) each provided with a cover 43, and with bushings 44: and 48, through which thehollow drill 45 passes, as well-as with a bushthe friction between the said gun barrel and drill exceeda certain amount, all as will be more clearly disclosed below.

As will be clear from Figs. 1, 3 and 6, the axes of the work 4:? are in prolongation of the axes of the various driving shafts 29, and that the said-work pieces 47 are held by the head stocks and revolved through the driving shafts by means of any suitable and well known connections, such as 55.; lt, accordingly, follows that as power is a plied through the belts 32, the power shaf ts 29 are revolved, as Welles the work pieces 417.

The drill spindles 455 are secured to their respective tail stocks by any suitable and well known means, such for example as the tubular vmembers 56, shown in Figs-t, 5, l3 and 14:, and they may be secured in said tubular members by friction or other means not shown. The said drill spindles are further normally held against rotation by means of the projecting members 57 talrin against the projecting members 58 carried by the rods 59 provided with the springs '64:, all as will be now more clearly disclosed. That is to say, on the chucks or tail stock connections, ll preferably provide cam members such as 57, see Figs. 5 and. 13, adapted to coact with lever-like projections 58 carried by the shafts 59 extending parallel to the supporting rods numbered from 8 to 7 and also extending from their respective tail stocks to their respective head stocks, as will be clear from Figs. 5 and ll, l2, l3 and 14.. The purpose of the cams 5t, rods 59, and enacting parts is to auto manner matically out 0d the power when the friction between the point of the drill 4:5 and the work exceeds a certain amount, and the means by which this is accomplished will now be described.

Referring more particularly toFig. 15, it will be readily understood that since the drill member 45 is held stationary in the tail stock, and since the barrel or work l? is constantly rotating, it is evident that the friction might, under certain conditions, become so great as to destructively strain the drill spindle 45. Tn order to prevent this result, I employ any suitable and well lmown means such as the tubular members 56, the cam members 57 and the projections 58, which will hold the drill spindles 4-5 against rotation until a predetermined strain is experienced; the parts being so arranged that the said member 56 will rotate and carry with it the cam 57 which in turn will, through the lever member 58, rotate the shaft 59 when said strain is exceeded. The rotation of this shaftwill in turn rotate the lever-like projection 60 carried by the shaft 59 (see Fig. 11) and raise it out of contact with the shoulder 61 and permit. the said projection 60 to slide along the slot 62 with which the lug 63 mounted on the head stock 36 is provided. v

The movement of the lug 60 in the slot 62 is accomplished by means of the spring 64-, which surrounds. the shaft 59 and takes against the head stock 36 at one end and the collar 65 at the other'end. This said spring,

in other words, slides the shaft 59 longitudi nally, and in thus moving the said shaft, it also moves the belt shipper 33 and carries the belt82 from the fast pulley 31 on to the loose pulley 30, all as will be clear from said Fig. 11.

The shifting of the belt, as just described, of course, cuts ofi' power from'the work, as well as from its corresponding feed screw, and of course stops the drilling operation.

The handle 66 with which the shaft 59 is also provided enables the operator to more the said shaft 59 a ainst the action of the spring 64:, and there ore restore all the parts to their normal positions. Tn addition to the above mechanism, there is disclosed in Figs. 13 and 14:, a curved or beveled lug or projection 66' adapted, as the tail stock t0 advances, to contact with the cam-like stop lever 67 with which the shaft 59 is also pro vided and to turn said lever 67 and shaft 59, as will now appear. This stop lever 6'? is adjustable along the shaft 59, and its object is to provide an automatic means by which the feeding movement of the tail turns it together with the shaft 59, whereupon, the shaft 59 is rotated on its axis, as above disclosed, and the belt shipper 33 moves the power belt from the power pulley 31 to the idle pulley 30, and therefore stops the drilling operation.

It will be understood, of course, that the work 47, as best illustratedin Fig. 15, freely rotates, and that this action is facilitated by the bushing 46, and the sleeve 49 in which is mounted the bushing 48. The rotation of the drill spindle 45 is further facilitated by means of the bushing 44, which freely rotates within the boring provided by the hood v42..

It is, of course, desirable to adjust the chiphoods 42 to and from the head stocks 36, and to firmly hold them in their adjusted positions in order to accommodate different lengths of work pieces. To accomplish this purpose, each of the hoods 42 is provided with a rod rigid with the hood 'at one end, and the other end adapted to freely slide through apertures in the different head stocks 36, as will be clear from Figs. 1 and 6. The said head stocks 36, however, are provided with a plug 71 and a piston 72 between which the said rod 70 passes. The piston 72 is adapted to be readily controlled by means of fluid under pressure in the pipe 73, which pipe in turn is controlled by the valve 74, associated with the fluid outlet 75, see F ig. 6. 1

It will now be clear from whathas just been said, that the chiphoods 42 and their associated rods 70, may be freely adjusted to and from the head stocks 36, whereupon a turningof the valve 74 will admit fluid under pressure above the piston 72, which will cause the latter to firmly clamp the rod 70 and its associated chiphood in its adjusted position. A turning of the valve 74 in the opposite direction will permit the fluid to escape through the pipe 75, and thereupon release the clamping action of the piston 72, whereupon the chiphood may be adjusted to a new position. v

The drill spindle 45 provided with a bore 76 adapted to constantly feed oil to the tip of the spindle, and thereby keep the latter well lubricated during the drilling operation. This oil is preferablysupplied under pressure to each drill spindle through a pipe 80, which communicates with the passage8l (see Fig. 9), which'passage is controlled by the longitudinally movable valve 82 provided with the by-pass 83. The said passage 81 further communicates with the branch passage 82 leading to the passage 83 in the tail stock which registers with the passage .76 in the-drill spindle 45, all as will be clear from Fig. 9. When, however, the valve 82 is raised into the position shown in said figure, oil will be cut ofi" from the df'ill spindle. Also controlling leading to the atmosphere. When the said valve 85 is so moved as to cause its by-pass 86 to register with the passage 81, then oil will be fed into the sleeve 88 and above the piston 89 located in said sleeve, and having the extension or piston rod 90 associated therewith. To the rod 90 is attached at one end the sleeve 91 having the friction surface .92 adapted to engage the corresponding friction cone 93 with which the sleeve 88 is provided. The said sleeve 88 is rigidly secured as at 94 to the tail stock 40, and therefore, does not move. To the piston 98, however, is secured the worm wheel 95 adapted to engage the feed screw 8, and also adapted to move up and down with said piston 89 a slight distance without disengaging said feed screw. Ac cordingly, when the by-pass 86 is so positioned as to admit oil to the piston 89, the said piston moves downwardly, as seen in Fig. 9, and jams the surfaces 92 and- 93 tofeed screw 8, it will act as a nut toward the 9 feed screw 8 and the latter will therefore feed the tail stock 40 forward. On the other hand, if the valve 85 is raised into the position shown in Fig. 9, so as to cut off the oil from the piston 89, the friction between the surfaces 92 and 93 will be released, as will presently appear, and the gear 95 will turn freely so that the feed screw 8 will not in that case move the tail stock 40.-

The means by which the friction between the surfaces 92 and 93 is released is as follows :A passage 101 connects the passage 81 with the bypass 86 and the exhaust 87 when the valve 85 is in the position shown in Fig.9, and therefore, the pressure which formerly existed upon the piston 89, is released, which accordingly, permits the surface 92 to rotate relative to the surface 93. The rod 90 is further provided with the hand wheel 105 through which the tail stock may be readily manipulated. That is to say, the rotation of the gear 95 may be prevented by holding the hand wheel 105 against rotation, and the tail stock thus be compelled to be fed alongby the feed screw Seven though oil is cut off from the piston 89. By turning the hand wheel 105 in the opposite direction, the tail stock may be of course, readily likewise, moved in an opposite direction. The valve 85 is provided with a head 106 which overlaps the head 107 with which the valve 82-is provided, and there.- fore, when the valve 85 is depressed, i-t. -further causes the valve 82 to be depressed.

The efi'ect of this action fed to the passages 82, 83 and 7 6, or to the drill spindle whenever the 'gear 95 is moved downward and the tail stock is being fed toward the work. That is to say, the overlapping of the head 107 by the head 106 prevents the drilling operation, except when oil is being fed to the drill point, while, of course, the mechanism is also such that the tail stock can be freely other cases.

The operation oing, but may follows:lPower being belt, such as 32, the shaft 29 is rotated and is to compel oil to be will be clear from the fore be briefly summarized as transmits power through gears 28, 27,

and 24 to the shaft 20 and through the gears 16 and 12 to one of the feed screws, such as 8. The shaft 29 also will turn the work 47, which may be a gun barrel, oneend of which is supported in a chuck such as 55, and the other end of which is supported in the rotatable member 46 mounted in the rotatable sleeve 49, which in turn is mounted in the bearing with which the chiphood 42 is provided. The hollow drill spindle 45 rests in the rotatable members 44 and 48, and therefore, permitthe said spindle to be normally stationary, while the work revolves, but to also rotate when the friction between the work and the point of the spindle eX- ceedsa predetermined amount. The spindle 45 is carried by the chuck 56 with which the tail stock 40 is provided, and when the friction between the spindle and work becomes excessive, volve, rotate the cam 57, the lever 58, and the shaft 59, which in turn will rotate the lever dog 60 thereby disengaging" the same from the shoulder 61 and permitting it to longitudinally slide in the slot 62 under the action of the spring 64, and thereby move the belt shipper 33 to the left, as seen in Fig. 11, and also the power belt from the fast pulley 31 to the loose pulley 30, thereby cutting 0d power from the work and feed screw. Further, as the tail stock 40 is fed forward by the feed screw 8, a projection 66' carried by the chuck 56 comes in contact with an adjustablestop 67', carried by the shaft 59 and rotates the said stop and shaft in the manner just described, so as to likewise cut off power from the work and feed screw. By adjusting the stop 67 along the shaft 59, the drill point can be made to automatically stop drilling, after having bored a. predetermined distance, even though the friction may not have become excessive.

The head stocks 36 .are rigidly secured to the framework, and in order to adjust the fix them at the proper distances from the said head stocks, the said chiphoods are provided with the adjustable rods 70, which may be clamped to the head stocks, as best illustrated in Fig. 6, by means manipulated as in p 95 against rotation.

applied through a the tail stock fed forward,

the said chuck 56 will reparting from the spirit of my supported of fluid supplied by the pipe 73, controlled by the cook 74 and acting against the piston 72.

In order to feed the tail stocks toward the work, oil under pressure is admitted through the channel 81 under the control of the valves 82 and 85 to the piston 89, which jams down the conical surface 92 against the surface 93, and thereby locks the gear When thus incapable of rotating, the said gear 95 acts as a nut and causes the tail stock 40 to be fed toward the work by the feed screw 8, all as will be clear from Fig. 9.

Tn order to insure that the tail stock and drill may not be fedforward unless oil is admitted to the channel 76 of the drill, the valve head107 of the valve 82 is overlapped by the valve head 106 of the valve 85 so that oil cannot be admitted to the piston 89 and unless the chan- 7 6 is open for nel 82 leading to the passage the admission of oil tothe drill point.

When oil is not admitted'tothe piston 98, on the other hand, then the surface 92 is not jammed against the surface 93 and the gear 95 turns freely with the spindle 90, and therefore, the tail stock is not fed forwardly. llt accordingly results from the structure now disclosed, that the tail stock may be automatically fed forward, or it may be fed forward and backward by manipulating the handle 105. v

T have shown four drill spindles adapted to simultaneously act upon four pieces of work, but of course, it is evident that any number of spindles may be provided.

It is obvious that those skilled 'in the art may vary the details of. construction, as well as the arrangements of parts, without deinvention, and therefore, I do not wish to be limited to the above'disclosure, by theclaiins.

What I claim is 1. In a drilling machine the combination of a plurality 'of power -shafts; a plurality of feed screws; independent connections between each power shaft and each feed screw; a plurality of head stocks through l'which said power shafts pass; a'plurality of guide rods on which said head stocks rest:

except as may be required.

a member associated with said guide rods through which saidfeed screws pass; means for clamping said member to said head stocks; means for rotatably supporting one end of the work; means for rotatably supporting the other end of the work; a normally non-rotatable drill spindle rotatably by said last mentioned means; and means for feeding said spindle from said feed screw, substantially as described 2. In a drilling machine the combination of a plurality of power shafts; a plurality of feed screws connected to said shafts; a

plurality of head stocks provided with extensions; a plurality of guide rods for supporting said extensions; a strip like member clamped to said guide rods and-extensions through which said feed screws pass; means carried by each power shaft for rotatably supporting one end of each workpiece; a plurality of rotatable means for rotatably supporting the other end of each work piece; a connecting member between each head stock and each of said last named supporting means; and a plurality of drill spindles supported, by said last named rotatable supporting means adapted to simultaneously contact with said work pieces, sub-- stantially as described.

3. In a drilling machine the combination of three or more supporting rods; three or more head stocks adjustably supported on said rods; three or more chip hoods provided with rotatable supporting means for the work pieces and drill spindles; a rod connecting each chip hood and head stock; a clamping means carried by each head stock for adjustably securing the same to its corresponding rod; and a strip located beneath said supporting rods to which each head stock is clamped; substantially as described.

4. In a drilling machine the combination of a plurality of supporting rods; end standards between which said rods are secured; a plurality of independent head stocks slid able on said rods; a strip associated with said rods for holding said head stocks in position; a chiphood for each head stock;

a rod connecting each chip and head stock; a clamp for securing each head stock to said rod; a plurality of normally non-rotatable drill spindles, means carried by each hood for rotatably supporting one-end of each spindle; and means associated with each spindle for permitting it to rotate when an abnormal strain is produced; substantially as described.

5. In a drilling machine, the combination of a head stock; a pair of guide rods for supporting said head stock; a tail stock;

a chip hoodlocated between said head and tail stocks; a fluid controlled piston on said head stock for adjustably securing said hood to said head stock; a rotatable work support carried by said hood; a rotatable drill support carried by said hood; and means carried by said tail stock for normally holding said drill against rotation, substantially as described.

'6. In a drilling machine, the'combination of a head stock; a tail stock; a chiphood located between said head and tail stocks; means for adjnstably securing said hood to said head stock; a rotatable work support' carried by said hood; nieans for rotatably supporting the work associated with said head stock; a rotatable drill support carried by said hood; means carried by said tail stock for normally holding said'drill against rotation; and means associated with said last mentioned means for cutting 0d the power of the machine when said drill is rofor automatically feeding the drill to the work. substantially as described.

8. In a drilling machine, the combination of a tail stock; means associated with said tail stock for normally holding one end of a drilling tool having an oil channel against rotation; means associated-with said stock for supplying oil to said channel; means for automatically stopping the machine when the drill begins to rotate; rotatable means for supporting the other end of said tool; and means for rotatably supporting the work in operative relation to said tool, substantially as described.

9. In a drilling machine, the combination of a tail stock; means associated with said tail stock for normally holding one end of a drilling tool having an oil channel against rotation; means associated with said stock for supplying oil to said channel; rotatable means for supporting the other end of said tool; means for rotatably' supporting the work in operative relation to said tool; means for automatically feeding the drill to the work; and means for preventing said automatic feed when the passage of oil to said channel is obstructed, substantially as I described.

10. In a drilling machine, the combination of a tail stock adapted to hold a drill tool having an oil channel, said tailstock also provided with an oil passage, adapted to deliver oil to said channel; means for automatically feeding said tail stock toward the work; means for controlling the supply of oil to said channel; and means coacting with said controlling means adapted to prevent the automatic feeding motion of said tail stock except when said passage is open to allow oil to enter said drill'channel, substantially as described.

11. In ,a tail stock provided with an oil passage, the combination of means for holding a drill tool having an oil channel in an operative'relation with the work; a valve controlling said passage; a cylinder with which said passage communicates; and a second valve also controlling said passage as well as said first valve, substantially as described.

12. In a tail stock provided with an oil passage, the combinationof means for holding a drill tool having an. oil channel in an operative relation with the work; a valve controlling said passage; a cylinder with nd mentioned means may cylinder; a feed screw;

which said passage communicates; a second valve also controlling said passage as well as said first valve; a feed screw; means on said tail stockcoacting with said feed screw to move said tail stock; and means associated' with said cylinder whereby said secbe prevented from moving said tail stock, substantially as described.

13. In a tail stock having an oil passage, a valve controlling said passage; a second valve also controlling said passage as well as said first valve; a cylinder with which said passage communicates; a piston in said a feed gear carried by said piston coacting with said feed screw; and means associated with said piston and gear for preventing the rotation of said feed gear when oil is admitted to said cylinder, substantially as described.

14. In a tail stock having an oil passage, a valve controlling said passage; a second valve also controlling said passage as well as said first valve; a cylinder with which said passage communicates; a piston in said cylinder; a feed screw; a feed gear earned by said piston coacting with said feed screw; and means comprising fixed and movable frictional members associated with said piston and gear for preventing the rotation of said feed gear when oil is admitted to said cylinder, substantially as described.

15. In a tail stock provided with an oil passage, the combination of means for holding a hollow drilling tool adapted to be fed from said passage; means for automatically feeding said tail stock toward the work; and means so controlling said feeding means and passage as to prevent said tool being moved except when said oil passage is open, substantially as described.

16. In a tail stock provided with an oil passage, the combination of means for holding a drill tool provided with an oil channel, adapted to be fed from said passage; a reciprocating valve controlling said passage; a feed screw for moving said tool toward the work; a connection comprising a fluid controlled piston between said screw and tail stock; a second valve for controlling said piston; and connections between said first and second valves, substantially. as described.

17. In a tail stock provided with an oil passage; the combination of a piston adapted to be operated by the oil in said passage; a feed screw; gear connections between said screw and piston; anda frictional connection between said tail stock and piston, substantially as described.

18..In a tail stock provided with an oil passage; the combination of a piston adapted to be operated by the oil in said passage; a feed screw; gear connections between said screw and piston; connections between said tail stock and piston comprising friction surfaces controlled by said piston, a valve controlling said passage; and a hand operated means adapted. to operate said piston independently of said valve and passage.

In testimony whereof I affix my signature, in presence of two witnesses.

CHARLES HENRY AUGUSTUS FREDERICK LOCKHART ROSS- Witnesses:

W. CAMPBELL, Gnonen H. Bannns. 

